AREG and pulmonary fibrosis: Given prior paradoxical links of Amphiregulin to fibrosis (Lu et al, 2006; de Vries & Noelle, 2010; Zaiss et al, 2013; Liu et al, 2016b, 2018, 2020), we sought to delineate the contributions of Amphiregulin in lung fibrosis in the context of PH.